just wodnering if you've ever toyed around with the idea of a formant filter for Metasonix?
I cant imagine what absolutely batshit sounds you could get out variable drive, formants, resonance, and feedback in the same box...
is this even a feasible idea in toob-land

The ancient (and extremely rare) TS-22 was a very similar concept, although the distances between the filter cutoffs were fixed. The TM-2 was essentially half a TS-22 with resonance shared between the filters.
Unless Eric decides to make something similar in the future, a set of RK4s and some mixing and CV sources would be a solid approximation of the functionality.

Seems like several RK4s (or one D2000) patched in parallel might do it.

GREAT IDEA - I've never patched D2000s for audio - normally do audio with S2000. What's the patching for audio? Is it pitch input or trigger of each pitched drum? Then audio out of that into the next one, etc?

Seems like several RK4s (or one D2000) patched in parallel might do it.

GREAT IDEA - I've never patched D2000s for audio - normally do audio with S2000. What's the patching for audio? Is it pitch input or trigger of each pitched drum? Then audio out of that into the next one, etc?

Fun to consider feedback loops with a Y-cable, too.

If I understand correctly, the RK-4/D-2000 pitched drum is a resonant bandpass filter. When you send a trigger in, you’re pinging the filter. You can send audio into either hole and get an interesting result. But for this application I’m guessing the trigger in would be the better choice.

For formants, you want the same audio input going into each filter, then sum the outs in a mixer. For more control, give each band a separate VCA before summing.

If I understand correctly, the RK-4/D-2000 pitched drum is a resonant bandpass filter. When you send a trigger in, you’re pinging the filter. You can send audio into either hole and get an interesting result. But for this application I’m guessing the trigger in would be the better choice.

For formants, you want the same audio input going into each filter, then sum the outs in a mixer. For more control, give each band a separate VCA before summing.

You nailed it

wonder if the rk4s can be modified to sweep frequency and cv the mofos.